goddard



March 15 1927.

f. INVENToR. /bdabfi Wulff)- March 15 1927 w. T. GoDbARD INSULATOR med oct. 1. 1921 2 sheets-sheet 2 IN V EN TOR.

Patented Mar. 15, 1927.

UNITED STATES 1,621,245 rarsur orties.

WALTER T. GODDARI), OF HAMILTON, ONTARIO, CANADA, ASSIGNOR TO LOCKE INSU- LATOR CORPORATION, 0F BALTIMORE, MARYLAND, .A CORPORATION OF MARY- LAND.

INSULATOR.

Application led October 1, 1921. Serial No. 504,665.

rlhe invention relatesv to high tension insulators, and more particularly to improvements in the method of connecting Vmetallic members to insulating sections.

The principal object of my invention, generally stated, is to provide a high tension insulator of maximum tensile strength, and the said insulator consisting of a plurality of members of porcelain or other dielectric material and a plurality of metallic sections secured together.

Another object of my invention is to provide an insulator in which the insulating and metallic portions are so connected as to eliminate or minimize strains due to the unequal ezipansion of the two elements under temperature changes.

A further object is to provide simple and eective means for securing the insulating sections together so as to simplify the connectionbetween various parts of a multiple unit insulator. j

rllhe invention will be further and more fully set forth and particularly. pointed out in the following specification.

in Figs. 1 to 4, inclusive, the numeral 1- designates generally a post insulator comprising a plurality of sections 2 and 3, preferably formed of porcelain. Eachy of the sections 3 is vprovided on the upper and lower faces thereof with annular concentric hub sections designated respectively 4 and 5. In each .section the hub portion 4 is of slightly less diameter thanthe hub section 5. Each of the sections 3, in the particular embodiment of the invention here illustrated, is of slightly less diameter than the section immediatelybelow the same, and consequently the lower hub 5 of each section is made of equal diameter with the upper section 4 so that the coacting portions will correspond in diameter. l.The hub sections 4 and 5 are each provided with openings 6 and 7. These openings intersect at points closely adjacent the upper and lower faces of the intermediate portion 8 of each section. The openings 7 are preferably radial openings and are cut from the inner face of the hub portions, while the openings (i, are substantially vertical and extend respectively from thefacesl of the lhub sections 4 and 5. These openings, which are preferably cylindrical in outline or section, may be formed in the insulating sections either in the so called leather dry state or after the insulator has hardened to the bone dry or white stage prior to firing. rihe object and purpose of these Openings will hereinafter be described. The top or cap section 2 is of disk form and may be provided with the usual construction of groove 9, flange 10 and circular groove 11 for securing the conductor thereto. On its under face the section 2 is provided with a hub 5 similar to the hubs V5 hereinbefore described in 'connection with; the sections 3 and preferably equal in diameter to the hub 4 of the adjacent section 3.

In order to connect the section 3 to each other and to thel section 2, I provide metal` disks 12 of slightly greater diameter than the hubs 4` and 5. These metal disks are secured to each section, as will be now described.k The disks 12 are each provided with 'a plurality of openings 13 corresponding in number and position to the openings 6 in each of the hub sections 4 and 5. In. each of the openings 6 of the hub sections 4 and 5 I insert bolts 14, the end of each bolt being threadably received in a nut 15 which is adapted to tit within the openings 7 These nuts 15 preferably conform to thcshape of the openings 7, as clearly indicated in the drawings. The projecting ends of the bolts 14 are adapted to be received in openings 13 provided in the co-l acting disks 12, and each disk is rigidlyV secured to its coacting hub section by means of nuts 17 which are threadably received on the outer ends of the bolts 14. Each disk 12 is also provided with a plurality of openings 18 adapted to receive the nuts 17 of the coacting section 3. The openings 6 are preferably made of sufficiently greater diameter than the diameter of the bolts 14 to permit lateral movements of the disk 12 and the sections 2 and 3 relative to each other due to unequal expansion and contraction of the metal and porcelain under temperature changes.

The metal disk `12 secured to the hub 5 ot the lower section 3 is preferably made of heavier metal than the intermediate disks 12 and is provided with means for securing it in operative position, such as the bolts 19,. It may also be formed with a flange 20, and preferably serves as a base i'or supporting the insulator.

Each of the intermediate disks 12 is provided around the periphery thereof with a plurality ot alined openings 21 through which passbolts 22 for rigidly uniting the various sections.

j It will v'bereadil'y apparent that the bolts 14, with the coacting nuts 15 and 17, secure the vIriet'allic disks 12 to each pf the hub sec-l tins,`and that by providing each disk with openings to receive the nuts 17 of the coacti'ng section the two adjoining disks 12 will be in intimate contact with each other and will provide a rigid connection between the adjacent sections. Since the faces of they hub sections are parallel to the faces of the disks 12, and since the openings 6 are of greater diameter than the diameter of the bolts 111, it will be apparent that the parts may expand and contract without placing destructive strains upon the porcelain or other dielectric material of which the insulator is constructed.

In Fig. 5 I have illustrated the use of metallic plates connected to a suspension insulator in the same general manner as I have hereinbefore described with reference to the post insulator illustrated in Figs. 1 to 4.v he suspension insulator of Fig. 5 is "designated by the reference numeral 23. The insulator 23 is furnished with hub sections 24 and 25 in each of which l provide theradial'openings 26 and the vertical openings`27. Bolts 14 with the nuts 15 and 17 are used to connect each hub section and the coacting metallic disk 27, said disks preferably being provided with a curved central boss 28 each of which coacts with thefcurvedend 29 of'an eye-bolt 30]y Tilhat l 'claim is 1. `A'high tension insulator comprising an imperiorate disk of insulating material having hub portions extending- 'from the opposite faces thereof, a pair oi substantially flat metallic disks cooperating with said disk ot insulating material, and connecting means therefor comprising headed members seated in correspondingly formed openings in said hub portions, said members being provided with projecting portions detachably secured to said metallic disks 2. A high tension insulator comprising a plurality ot insulating units each of which isp'rovided with an integral hub, the hubs of adjacent units being adapted to cooperate, and means for connecting said, adjacent hubs, said means including headed members fitting in correspondingly formed recesses in the respective hubs, metallic plates detachably connected to said headed members, and connecting means for said adjacent metallic plates.

A high tension insulator unit comprising a body member ot insulating material provided at opposite sides with flat faces, the body being formed with a cavity extend-- ing 'out to each iiat face and being formed within the wall of each cavity with a series oit radial openingsl and a series o'l' other openings communicating` therewith vand ar- `anged in parallel relation to the longitudinal axis of the body, a iiat disk disposed against and projecting beyond each 'flatside or' the body, and securing members extending through the second named openings and one disk and having retaining means at both ends thereof, the retaining means at one end engaging within the first named openings and the retaining means at the other end being located outwardly of the disks.

4i ln a high tension insulator a unitformed as a body of dielectric material formed with a cavity and a series of radial openings in the wall ot the cavity, said openings communicating with the cavity, the body having a series of circumferentially arranged openings extending parallel tothe longitudinal axis and in communication with said first'nained openings and eX- tending out to one side of the body, a metal disk disposed against said side ot'the body, and securing members extending through the'secondnamed openings and the'disk and provided with heads engaging exteriorly` (if the latter, and retaining members having threaded connection with said securing members and located within said radial openings.

5. A high tension insulator comprising a plurality of units of insulating vmaterial or disk form, concentric annular hubs formed on the upper and lower faces of said disk, each oi' said hubs being provided witlropenings therein, metallic disks provided with openings opposing the openings in said hubs, and means, passing through theiopenings in each hub and the adjacent disks, for securing said metallic disk to said insulating disk and means ior securing adjacent metallic disks to each other.

G. A high tension insulator colnprisinga plurality oi units ot insulating inaterialoi disk form, concentric hubs formed on `the upper and lower faces of saiddisk, a metallic disk of greater diameter than the diameter of said hub secured to cachot said hubs by members housed within the same, and

meansfor securing the disks of adjacent sections together.

7. In a high tension insulator, a. unit formed as a body of dielectric material formed with a cavity and a series of radial openings in the wall of the cavity, said openings communicating with the cavity, the body having a series of circumferentially arranged openings extending parallel to the longitudinal axis and in communication with said irst named openings and extending out tol one side of the body, a metal disk disposed against said side of the body, and securing members extending through the second named openings and the disk and provided with heads engaging exteriorly of the latter, and retaining members having threaded connection with said securmg members and located within said radial openings, the disk projecting beyond the side of the body engaged thereby and the projecting portion thereof being apertured for the reception of securing elements whereby the unit may be connected with an adjacent unit.

8. A high tension insulator comprising a plurality of units each Jformed as a dielectric body having a cavity at its top and bottom and provided with a plurality of radial openings communicating with each cavity and a plurality of openings parallel with the longitudinal axis and communicating with the iirst named openings, certain of the second named openings leading to the top and the remainder leading out to the bottom of the body, disks disposed against the top and bottom of the body, Securing members passing through the second named openings and the adjacent disks and having heads located outwardly of the latter, and retaining members located within the first named openings and vdetachably connected with the securing members, the disks being apertured for the reception of the heads of the securing members of adjacent units.

9. In a high tension insulator, an insulating unit consisting of a disk of insulating material provided with a concentric annular hub, said hub being provided with a plurality of openings extending outwardly :from the inner surface of said hub and having a plurality of openings within said hub portion, said last named openings intercepting the first named openings at approximately right angles, and means for securing said metallic disk to the insulating disk through the openings in said hub.

In testimony whereof I affix my signature.

l T. GrODDARl?ll 

